Strong mag. 5.4 earthquake - 123 km west of Hirosaki, Aomori, Japan, on Monday, June 20, 1983 at 02:43 GMT

Strong mag. 5.4 earthquake - 123 km west of Hirosaki, Aomori, Japan, on Monday, June 20, 1983 at 02:43 GMT Strong mag. 5.4 earthquake - 123 km west of Hirosaki, Aomori, Japan, on Monday, June 20, 1983 at 02:43 GMT

Strong magnitude 5.4 earthquake at 18 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.

Earthquake details

Date & timeJun 20, 1983 02:43:24 UTC
Local time at epicenter
StatusConfirmed
Magnitude5.4
Depth18.3 km
Epicenter latitude / longitude41.004°N / 139.12°E (Japan Sea, Japan)
Antipode41.004°S / 40.88°W
Shaking intensityModerate shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoOshima-Oshima (60 km / 37 mi)
Nearby towns and cities108 km (67 mi) W of Shimokizukuri (Tsugaru) (pop: 18,900) | Show on map | Quakes nearby
113 km (70 mi) W of Goshogawara (pop: 49,100) | Show on map | Quakes nearby
117 km (73 mi) NW of Noshiro (pop: 51,100) | Show on map | Quakes nearby
123 km (76 mi) WNW of Hirosaki (pop: 175,000) | Show on map | Quakes nearby
137 km (85 mi) W of Aomori (pop: 298,400) | Show on map | Quakes nearby
146 km (91 mi) NW of Ōdate (pop: 64,500) | Show on map | Quakes nearby
160 km (99 mi) WSW of Hakodate (pop: 275,700) | Show on map | Quakes nearby
166 km (103 mi) NNW of Akita (pop: 320,100) | Show on map | Quakes nearby
294 km (183 mi) SW of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby
593 km (369 mi) N of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
Estimated seismic energy released7.9 x 1012 joules (2.21 gigawatt hours, equivalent to 1898 tons of TNT or 0.1 atomic bombs!) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
5.418 kmHokkaido, Japan regionUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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Aftershocks

[More info]

Recorded aftershocks, latest first (4 quakes)

Date and timeMag
Depth
LocationDetails
Jul 24, 1983 19:07
39 years ago
4.3

33 km
125 km W of Hirosaki, Aomori, JapanMore
Jun 30, 1983 04:33
39 years ago
4.6

33 km
99 km W of Shimokizukuri, Tsugaru Shi, Aomori, JapanMore
Jun 22, 1983 04:36
39 years ago
5.0

15 km
124 km NW of Hirosaki, Aomori, JapanMore
Jun 22, 1983 00:59
39 years ago
4.5

33 km
90 km NW of Noshiro, Akita, JapanMore

Earlier earthquakes in the same area

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